1 Vaginal itching: Introduction. 2  Sweating and Vaginal itching and Bleeding symptoms (3 causes) 3  Sweating and Vaginal itching and Body symptoms (3 causes) 4  Sweating and Vaginal itching and Chills (3 causes)  Sweating and Vaginal itching and Female genital symptoms (3 causes)
Before the advent of smoking it was very rare to find cancer in the lungs. In fact, in 1878, only 1 percent of autopsies performed at the Institute of Pathology of the University of Dresden in Germany found cancers in the lungs. Almost 40 years later, that number had risen to 14 percent.
Areas of research. Cause. Early research on the cause of cancer was summarized by Haddow in 1958. The first chemical carcinogen was identified in 1928-29 as 1:2-5:6-dibenzanthracene, and the carcinogeneic substance in pitch was identified as 3:4-benzopyrene in 1933.